Zoltan Hudak / Mbed OS mbed-os-bluepill

Bluepill STM32F103C8 support for Mbed OS 6

Bluepill board support for Mbed OS 6

Warning

It does not work with the Mbed Online Compiler.

This is an example of configuration for the Bluepill board for Mbed OS 6.

It shows how to create a custom board support based on Mbed OS and how to compile a simple Blinky application.

Note this project makes use of the full Mbed OS with RTOS included. It's possible to make changes in the configuration to support the Baremetal profile and reduce memory requirements - see this.

Example application

This repository includes blinky.cpp as an example application to demonstrate how to use the Bluepill custom board support. It's expected to work out of the box using both Mbed CLI and Mbed Studio. Note this test application can be ignored using the MBED_BLINKY_EXAMPLE macro in mbed_app.json, so you can add your own files and application on top of this project.

You can follow these steps to import and compile with Mbed CLI:

mbed import https://os.mbed.com/users/hudakz/code/mbed-os-bluepill
mbed compile -t GCC_ARM -m bluepill

Bluepill and Mbed OS version support

BluepillMbed OS (hash)Status
preview6.2.0 (#a2ada74770 )Compiles and runs ok

Updating Mbed OS

Note not every version of Mbed OS is being tested, therefore update at your own risk. Unless strictly required, you should stick to versions of Mbed OS that are known to work ok.

If you do want to udpate Mbed OS, then follow these steps:

cd mbed-os
mbed update <mbed-os hash / tag>

Testing

This application has been tested on the Bluepill board and runs ok: it blinks and LED and sends a message over the serial port (115200 bauds - see mbed_app.json).

However, it's recomended to run regression tests based on the Greentea framework whether possible (more details to be added).

Programming with STLink programming utility

The Bluepill board doesn't have a programming interface on board. However, it's easy to connect an external adapter such as the STLink/V2 and get it working in minutes.

Use the STM32 ST-Link utility to program the binary into the device.

https://os.mbed.com/media/uploads/hudakz/stlink-prog.png

Wire the Bluepill to the STLink and serial adapter as follow:

BluepillSTLink (20-pin JTAG)Serial adapter
SDWIO (CN4)7-
SWCLK (CN4)9-
RESET15-
GND4GND
TX (PA_2)-RX
RX (PA_3)-TX

ST-LINK/V2 JTAG pintout
https://os.mbed.com/media/uploads/hudakz/jtag_pinout.png

This is the pinout of the Bluepill board: /media/uploads/hudakz/stm32f103c8t6_pinout_voltage01.png

https://os.mbed.com/media/uploads/hudakz/connections.jpg

Additional example programs

Bare metal on Bluepill
Bare metal with EventQueue on Bluepill

Warning

The examples above are not meant to be compiled with the online compiler. Follow these steps to import and compile them with Mbed CLI:

mbed import Program's_URL
mbed compile -t GCC_ARM -m bluepill

Known issues

  • Please check the issues reported.

TARGET_BLUEPILL/PinNames.h

Committer:
hudakz
Date:
2021-01-08
Revision:
10:fc04048e7188
Parent:
0:2577a4fb6e72

File content as of revision 10:fc04048e7188:

/* mbed Microcontroller Library
 *******************************************************************************
 * Copyright (c) 2014, STMicroelectronics
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of STMicroelectronics nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *******************************************************************************
 */
#ifndef MBED_PINNAMES_H
#define MBED_PINNAMES_H

#include "cmsis.h"
#include "PinNamesTypes.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
    ALT0  = 0x100,
    ALT1  = 0x200,
    ALT2  = 0x300,
    ALT3  = 0x400
} ALTx;

typedef enum {
    PA_0  = 0x00,
    PA_1  = 0x01,
    PA_2  = 0x02,
    PA_3  = 0x03,
    PA_4  = 0x04,
    PA_5  = 0x05,
    PA_6  = 0x06,
    PA_7  = 0x07,
    PA_7_ALT0 = 0x07 | ALT0,
    PA_8  = 0x08,
    PA_9  = 0x09,
    PA_10 = 0x0A,
    PA_11 = 0x0B,
    PA_12 = 0x0C,
    PA_13 = 0x0D,
    PA_14 = 0x0E,
    PA_15 = 0x0F,

    PB_0  = 0x10,
    PB_0_ALT0 = 0x10 | ALT0,
    PB_1  = 0x11,
    PB_1_ALT0 = 0x11 | ALT0,
    PB_2  = 0x12,
    PB_3  = 0x13,
    PB_4  = 0x14,
    PB_5  = 0x15,
    PB_6  = 0x16,
    PB_7  = 0x17,
    PB_8  = 0x18,
    PB_9  = 0x19,
    PB_10 = 0x1A,
    PB_11 = 0x1B,
    PB_12 = 0x1C,
    PB_13 = 0x1D,
    PB_14 = 0x1E,
    PB_15 = 0x1F,

    PC_0  = 0x20,
    PC_1  = 0x21,
    PC_2  = 0x22,
    PC_3  = 0x23,
    PC_4  = 0x24,
    PC_5  = 0x25,
    PC_6  = 0x26,
    PC_7  = 0x27,
    PC_8  = 0x28,
    PC_9  = 0x29,
    PC_10 = 0x2A,
    PC_11 = 0x2B,
    PC_12 = 0x2C,
    PC_13 = 0x2D,
    PC_14 = 0x2E,
    PC_15 = 0x2F,

    PD_2  = 0x32,

    // ADC internal channels
    ADC_TEMP = 0xF0,
    ADC_VREF = 0xF1,

    // PCB printout
    A0          = PA_0,
    A1          = PA_1,
    A2          = PA_2,
    A3          = PA_3,
    A4          = PA_4,
    A5          = PA_5,
    A6          = PA_6,
    A7          = PA_7,
    A8          = PA_8,
    A9          = PA_9,
    A10         = PA_10,
    A11         = PA_11,
    A12         = PA_12,
    A15         = PA_15,

    B0          = PB_0,
    B1          = PB_1,
    B2          = PB_2,
    B3          = PB_3,
    B4          = PB_4,
    B5          = PB_5,
    B6          = PB_6,
    B7          = PB_7,
    B8          = PB_8,
    B9          = PB_9,
    B10         = PB_10,
    B11         = PB_11,
    B12         = PB_12,
    B13         = PB_13,
    B14         = PB_14,
    B15         = PB_15,

    C13         = PC_13,
    C14         = PC_14,
    C15         = PC_15,

    // STDIO for console print
#ifdef MBED_CONF_TARGET_STDIO_UART_TX
    STDIO_UART_TX = MBED_CONF_TARGET_STDIO_UART_TX,
#else
    STDIO_UART_TX = PA_2,
#endif
#ifdef MBED_CONF_TARGET_STDIO_UART_RX
    STDIO_UART_RX = MBED_CONF_TARGET_STDIO_UART_RX,
#else
    STDIO_UART_RX = PA_3,
#endif

    // Generic signals namings
    LED1        = PC_13,
    LED2        = PC_13,
    LED3        = PC_13,
    LED4        = PC_13,
    SERIAL_TX   = STDIO_UART_TX,
    SERIAL_RX   = STDIO_UART_RX,
    USBTX       = STDIO_UART_TX,
    USBRX       = STDIO_UART_RX,
    I2C_SCL     = PB_6,
    I2C_SDA     = PB_7,
    SPI_MOSI    = PA_7,
    SPI_MISO    = PA_6,
    SPI_SCK     = PA_5,
    SPI_CS      = PA_4,
    PWM_OUT     = PB_5,

    //USB pins
    USB_DM = PA_11,
    USB_DP = PA_12,

    // Not connected
    NC = (int)0xFFFFFFFF
} PinName;

#ifdef __cplusplus
}
#endif

#endif